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Site Safety flan July 27, 1990 <br /> ARCO Sladon No. 6100, Tracy, Caiijontia <br /> Table 1 <br /> - EXPOSURE LIMITS OF ANTICIPATED CHEMICAL CONTAMINANTS <br /> ARCO Service Station No. 6100 <br /> 25775 South Patterson Pass Road <br /> Tracy, California <br /> Contaminant PEL EL ED CL TWA STEL <br /> PEL - permissible exposure limit: 8 hour, time-weighted average, California <br /> Occupational Safety and Health Administration Standard (CAL OSHA) <br /> ., EL - excursion limit: maximum concentration of an airborne contaminantto which <br /> f <br /> an employee may be exposed without regard to duration provided the 8 hour <br /> time-weighted average for PEL is not exceeded (CAL-OSHA) ' <br /> ED - excursion duration: maximum time period permitted for an exposure above <br /> the excursion limit but not exceeding the ceiling limit (CAL-OSHA) <br /> CL - ceiling limit: maximum concentration of airborne contaminant which <br /> i � employees may be exposed permitted (CAL-OSHA) <br /> TWA - time-weighted average: 8 hour, [(same as threshold limit value (TLV))], <br /> American Conference of Governmental Industrial Hygienists (ACGIH) <br /> STEL_ short-term exposure limit: 15 minute time-weighted average (ACGIH) <br /> # - milligrams of substance per cubic meter of air (mg/m ) <br /> �carc] parts of gas or vapor per million parts air <br /> - substance identified as a suspected or confirmed carcinogen <br /> f._. [skin] - substance may be absorbed into the bloodstream through the skin, mucous <br /> ' membranes, or eyes <br /> 1 - FederaI OSHA benzene limits given for PEL and STEL; STEL has a 50 <br /> minute duration limit <br /> 2 - Federal OSHA gasoline limit given for PEL; STEL is the same for FED- <br /> p `f <br /> OSHA and ACGIH <br /> i.; <br /> 4 Doc#A t06767;V 1.1 <br />